lsc.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2026, Ideas on Board, Oy
 *
 * IPU3 Lens Shading Correction algorithm
 */
 
#pragma once
 
#include <vector>
 
#include "libipa/fixedpoint.h"
#include "libipa/lsc.h"
 
#include "algorithm.h"
 
namespace libcamera {
 
namespace ipa::ipu3::algorithms {
 
class Lsc : public Algorithm
{
public:
    int init(IPAContext &context, const ValueNode &tuningData) override;
    void queueRequest(IPAContext &context, const uint32_t frame,
              IPAFrameContext &frameContext,
              const ControlList &controls) override;
    int configure(IPAContext &context, const IPAConfigInfo &configInfo) override;
    void prepare(IPAContext &context, const uint32_t frame,
             IPAFrameContext &frameContext,
             ipu3_uapi_params *params) override;
    void process(IPAContext &context, const uint32_t frame,
             IPAFrameContext &frameContext,
             const ipu3_uapi_stats_3a *stats,
             ControlList &metadata) override;
 
private:
    std::vector<double> calculatePositions(unsigned int dimension);
 
    unsigned int numHCells_;
    unsigned int numVCells_;
    unsigned int blockWidthLog2_;
    unsigned int blockHeightLog2_;
 
    unsigned int lastAppliedCt_;
    unsigned int lastAppliedQuantizedCt_;
 
    unsigned int sensorWidth_;
    unsigned int sensorHeight_;
    unsigned int cropWidth_;
    unsigned int cropHeight_;
 
    bool polynomial_;
 
    LscAlgorithm<UQ<2, 10>> lscAlgo_;
};
 
} // namespace ipa::ipu3::algorithms
 
} // namespace libcamera